
Mark the checkbox next to it, and another option should appear at the bottom. There is a new option on the top of the list that is captioned "Support audio formats (mp3,wav,wma,midi.). To do that, head to the Settings panel (press F12) and then click on the Video tab. The new feature isn't enabled by default, so you'll need to configure it manually. Yes, the program did support videos (with audio playback) earlier, but it couldn't play audio files before this update. The application now supports audio tracks.

That's not all that's new in FastStone Image Viewer 7.5. The toolbar, menu bar, status bar, the preview pane, and even the borders of each pane look visually better in the new theme. The new Dark theme is a proper black one, and noticeably easier on the eyes. Technically, the program did have a slightly darker mode in the form of a Grey theme. Here's a side-by-side comparison of the Bright and Dark themes.

You can enable the new dark mode in FastStone Image Viewer from the Settings Menu > Dark. Emsisoft recently added a dark theme to its portable antivirus, Emergency Kit, and now FastStone has jumped to the bandwagon. The dark theme trend seems to be influencing many Windows programs.
